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M318 Wheeled Excavator

M318 Wheeled Excavator

Unmatched Performance and Versatility

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More Comfort – More Performance – More Versatility

  • Increased Performance

    Work faster with up to 14% more swing torque, lower fuel consumption and more versatility with tiltrotator integration.

  • Up To 10% Lower Maintenance Costs

    Longer, synchronized service intervals, 100% daily ground level maintance and centralized grease points with an autolube option lower your overall costs.

  • Enhanced Comfort

    Redesigned Deluxe and premium cab options offer an ergonomic control layout and improved visibility.

  • Up To 10% Less CO2 Emissions

    The M318 emits up to 10% less CO2 than the previous M318F.


Biodiesel Capability Up to B20¹
Bore 4 in
Displacement 285.5 in³
Emissions Meets U.S. EPA Tier 4 Final, EU Stage V, Japan 2014 emission standards.
Engine Model C4.4
Engine Power - ISO 14396 174 HP
Engine Power - ISO 14396 (DIN) 176 hp (metric)
Net Power - ISO 9249 171 HP
Net Power - ISO 9249 (DIN) 174 hp (metric)
Note (1) Net power advertised is the power available at the flywheel when the engine is equipped with fan, air cleaner, CEM exhaust gas aftertreatment, alternator, and cooling fan with engine speed at 2,200 rpm. Advertised power is tested per the specified standard in effect at the time of manufacture.
Note (2) ¹Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels** up to: 20% biodiesel FAME (fatty acid methyl ester)* or 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels.Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations“ (SEBU6250) for details. * Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel (for use of blends higher than 20% biodiesel, consult your Cat dealer).** Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels.
Stroke 5 in

Hydraulic System

Main System - Maximum Flow - Implement 67 gal/min
Maximum Pressure - Equipment 5366 psi
Maximum Pressure - Swing 5149 gal/min
Maximum Pressure - Travel 5076 gal/min

Machine Weight

Note (1) Operating weight includes full fuel tank, operator, bucket 610 kg (1,340 lb), and dual pneumatic tires. Weight varies depending on configuration.
Note (2) Typical configurations include 2500 mm (8'2") medium stick and 3700 kg (8,157 lb) counterweight.
Operating Weight Maximum 43980 lb
Operating Weight Minimum 38580 lb

Service Refill Capacities

Cooling System 8.5 gal (US)
Diesel Exhaust Fluid (DEF) 5.3 gal (US)
Final Drive 0.7 gal (US)
Fuel Tank 92.5 gal (US)
Hydraulic System - Including Tank 68.7 gal (US)
Hydraulic Tank 31.7 gal (US)

Service Refill

Engine Oil 2.9 gal (US)


Boom 5205 mm (17'1")
Bucket 0.91 m³ GD (1.19 yd³)
Counterweight Clearance 4.3 ft
Ground Clearance 1.1 ft
Shipping Height - Top of Cab 11 ft
Shipping Length 27.8 ft
Stick 2.5 m (8' 2")
Support Point 11.5 ft
Tail Swing Radius 7.7 ft
Wheel Base 8.9 ft

Working Ranges and Forces

Boom Type VA Boom
Bucket 0.91 m³ GD (1.19 yd³)
Bucket Forces (ISO) 26752 lbf
Cutting Height 33.7 ft
Digging Height 19.3 ft
Note (1) Range values are with dual pneumatic tires (10.00-20). Range values are calculated with a GD bucket (CW) and CW-30 quick coupler with a tip radius of 1484 mm (4'10"). Force values are calculated with heavy lift on, a GD bucket (pin-on), and a tip radius of 1378 mm (4'6").
Reach at Ground Level 30.2 ft
Stick 2.5 m (8' 2")
Stick Forces (ISO) 16861 lbf
Vertical Wall Digging Depth 15.1 ft

Swing Mechanism

Maximum Swing Speed 32560 ft·lbf
Swing Speed 9.4 r/min


Maximum Travel Speed 21.7 mile/h

Air Conditioning System

Note The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 0.85 kg of refrigerant which has a CO2 equivalent of 1.216 metric tonnes.


Recyclability 92%

Download resources

M318 Product Brochure
M318 Technical Specifications (Aus-NZ, Eur, N Am, Korea)
M318 Technical Specifications (Afr-ME, N Am)

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